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MHT CET 2024 (16 May, Shift 1) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from MHT CET 2024 (16 May, Shift 1)

Q65MHT CET 2024 · 16 MAY · SHIFT 1Medium

Kirchhoff's Laws & Measuring Instruments

When a resistance of $100\ \Omega$ is connected in series with a galvanometer of resistance G, its range is V. To double its range a resistance of $1000\ \Omega$ is connected in series. The value of G is

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Answer: (a)

Range $V = I_g(G + R)$ with fixed $I_g$ .
The intended reading is that the $1000\ \Omega$ replaces the $100\ \Omega$ : $G + 1000 = 2(G + 100)$ .
$G = 1000 - 200 = 800\ \Omega$
So the answer is (a) $800\ \Omega$ .

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